Avidemux is a nice little piece of free video converting and editing software. It’s a lot of people’s first choice when it comes to simple video editing and converting tasks as it’s open-source and free. By utilizing what Avidemux called filter, you can easily perform video editing on a video. It also supports converting videos between a lot of different formats. So, if you want to use it to convert AVI to MP4, you’ve made the right choice. The advantage of Avidemux, as is mentioned above, is that it’s free. You won’t have to pay for it to get your AVI videos converted to MP4. But it isn’t perfect. For example, the interface looks a bit outdated when compared to modern software we use in our daily life and it uses a lot of specific terms that might look strange in novice’s eyes. But if you have experience using similar programs, then you should find no problem using Avidemux to convert AVI to MP4. But to help beginners of the program to learn to use the program, I will include a detailed tutorial of using Avidemux to convert AVI to MP4.

Part 1: How to Use Avidemux to Convert AVI to MP4

Follow the instructions below and it will only take you a few seconds to learn how to use Avidemux to convert AVI to MP4.

Step 1. Add Source AVI Video
Launch Avidemux on your computer and then import the AVI video you want to convert to MP4. You can directly drag the AVI videos to the interface of Avidemux to import them. Or click File>Open and then choose the needed AVI videos from the Select Video File dialog box.

Step 2. Choose Video Output
Click on the option box under Video Output label and then select the video codec you need from the drop-down menu.

Step 4. Set MP4 as Output Format
Find the option box under Output Format label and click on it. On the following drop-down menu, select MP4 Muxer to set MP4 as the default output format.

Step 5. Start Conversion from AVI to MP4
To start converting AVI to MP4 with Avidemux, click the Save Video button on the top row of icons (the location of this button might vary according to personal settings) or click File>Save. And on the following Select File to Save dialog box, select a place to save the video in and name the video in the FileName box. And then click Save to allow Avidemux to start converting AVI to MP4.

Avidemux also support converting videos in a lot of other formats. If you need, you can give them a try.

The first Avidemux alternative I will use is Leawo Video Converter, a professional video converter as its name shows. Not only a video converter, Leawo Video Converter is also an audio converter or audio extractor. On one hand, Leawo Video Converter is able to convert video from one format to another format including MP4, AVI, MOV, MKV, MTS, FLV, etc., and at the same time the program is able to convert various audio files like MP3, AAC, FLAC, AC3, etc. On the other hand, this professional program allows users to extract audio track from video files. The input and output video and audio formats supported by Leawo Video Converter include Common Video (MP4, H.265 MP4, MKV, H.265 MKV, MOV, etc.), Common Audio (AAC, AC3, WAV, MP3, WMA, FLAC, etc.), HD Video (HD MP4, HD AVI, HD TS, HD VOB, etc.), and 4K Video (4K MP4 and 4K MKV). This professional converter is able to convert video and audio files with 100% quality reserved and in 6X faster speed.

Leawo Video Converter is equipped with an internal video editor and player for you to edit video files, including video trimming, adding watermark, video cropping, adding video effect, turning 2D video to 3D, and removing video noise. At the same time, the internal video player allows you to play video files after video importing.

As is mentioned before, Leawo Video Converter can be regarded as a video converter for you to convert video files from one format to the other. Therefore, it can play the role of AVI to MP4 converter to convert AVI to MP4. If you are using Mac computer, you can make use of the Mac version of Leawo Video Converter. Download and install the right version of Leawo Video Converter based on your computer system, and follow the guide below to convert AVI to MP4.

Step 2. Set MP4 as Output Format
Click the drop-down box named “MP4 Video” by default next to the “Add Photo” button. On the drop-down list, select “Change” option. Then on the popup Profile window, select “MP4” from “Format” column as output format. Please note that once you change the output format, the name of the drop-down box will change as well. As the preset output format is MP4, to convert AVI to MP4, actually we can skip this process to leave it as default.

Step 3. Convert AVI to MP4
Click the big green “Convert” button on the sub-menu bar next to the format setting drop-down box. Then, on the popup sidebar, set output directory. After setting output directory, click the “Convert” button right below. Leawo Video Converter would start to convert AVI to MP4 immediately.

Note: Leawo Video Converter is equipped with an internal video editor, which means you can edit video after you import source video files. There are many ways allowable for you to edit loaded video files: video trimming, cropping, watermarking, adjusting video effect and removing noise. At the same time, Leawo Video Converter has an internal video player that allows you to play video files after video importing.

Step 2. Choose Output Video Format
Once source AVI video is imported, you will be prompted with a small window panel, where you can choose output video format, rename output video name, and choose output folder. To convert to MP4, you need to choose MP4 as the output video format.

Step 3. Start to Convert AVI to MP4
After you set the output video format, name and folder, click “Save” to start to convert AVI to MP4. After a while, the converted result will be saved in the folder you just set.

Part 4: Alternative to Avidemux to Convert AVI to MP4 – CloudConvert

The third Avidemux alternative I will use is CloudConvert. CloudConvert is an online video converter, and it claims that it can convert anything to anything on its official website. Of course, we can use it to convert AVI to MP4. Most importantly, this service is totally free of charge.

Step 1. Import Source AVI Video
On the official website of CloudConvert, choose “Select Files” to choose and import target AVI file into the converter interface.

Step 3. Start Conversion
You need to click “Start Conversion” at the bottom right to start the conversion process, at the same time you can tick “Notify me when it is finished” and choose to “Save file to my Dropbox/Google Drive, etc.” After that, you can download and get converted result on your computer.

Part 5: Alternative to Avidemux to Convert AVI to MP4 – FileZigZag

The fourth alternative is FileZigZag, which supports thousands of types of unit conversions, making it easy for users to reach a one-stop shop without having to jump from one location to another. Here we convert AVI to MP4 with FileZigZag.

Step 1. Import Source AVI Video File into FileZigZag
The interface of the web page is very simple. The first bar is for you to import file. Here, we choose to import the pre-prepared AVI video files.

Step 3. Input Your Email Address and Start to Convert
In the third bar, you need to input your email address, and then click “Convert” in the fourth bar. After a while, the converted result will be sent to your email box.